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INTRODUCTION TO CELLS I. CELL DIVERSITY A.Shape 1.Reflects function of the cell (CELL DIVERSITY continued) B. Size 1.Giraffe – nerve cell is 2 meters long 2.Human egg cell – about size of a period at end of sentence 3.Most are microscopic BASIC PARTS OF CELL Plasma Membrane – outer boundary that covers cell’s surface BASIC PARTS OF CELL Cytoplasm – all of the area and parts inside the plasma membrane but not part of the nucleus Nucleus – membrane bound structure that contains DNA TWO BASIC TYPE OF CELLS PROKARYOTES & EUKARYOTES DNA as genetic material RNA for protein synthesis Glycolysis – breaking down glucose for energy Ribosomes PROKARYOTES Vs. EUKARYOTES No nuclear membrane Domains Bacteria & Archaea Unicellular Nuclear membrane Domain Eukarya Unicellular or multicellular PLANT Vs. ANIMAL Cell wall – rigid No cell wall layer outside membrane No Central Central Vacuole – Vacuole reservoir that stores large amount of water Chloroplasts – No Chloroplasts photosynthesis takes place